One great conversation, video or breakthrough can really shift you. It rarely holds on its own, and it's weakest for addiction. Turn the insight into a daily practice (a sentence you say, a cue, a person who checks in) and keep any treatment that works.
S Evidence: strong. Large trials or many studies, pointing the same way.
E Evidence: built from practice. What works for coaches and practitioners. Labelled that way.
Sources
Across 50 randomised trials with 10,508 young people, one-session interventions helped (g = 0.32), most for anxiety (0.56) and conduct problems (0.54), barely for substance use (0.08), and effects shrank after about 13 weeks (Schleider & Weisz 2017, meta-analysis, 🟢) · "accurate but insufficient": Peter Crone on knowing his quotes (🟠) · see 9: judge a habit at day 66.
Not medical, legal or financial advice.